Wednesday, Feb. 6, 2002
... We’ve been learning kinematics; describing motion without understanding what the cause of the motion was. Now we are going to learn dynamics!! FORCEs are what cause an object to move Can someone tell me The above statement is not entirely correct. Why? what FORCE is? Because when an object is moving ...
... We’ve been learning kinematics; describing motion without understanding what the cause of the motion was. Now we are going to learn dynamics!! FORCEs are what cause an object to move Can someone tell me The above statement is not entirely correct. Why? what FORCE is? Because when an object is moving ...
Momentum and Impulse MC practice problems
... perfectly inelastic collision, what is the final speed of the newly formed object? (A) v / 3 (B) v / 2 (C) 2v / 3 (D) v (E) 3v / 2 19. A Freight car is moving freely along a railroad track at 7 m/s and collides with a tanker car that is at rest. After the collision, the two cars stick together and c ...
... perfectly inelastic collision, what is the final speed of the newly formed object? (A) v / 3 (B) v / 2 (C) 2v / 3 (D) v (E) 3v / 2 19. A Freight car is moving freely along a railroad track at 7 m/s and collides with a tanker car that is at rest. After the collision, the two cars stick together and c ...
Exam 1 - RIT
... At t = 0 , you stand at the origin and throw a ball at an angle of 30.0 degrees (Counter-Clockwise) with respect to the positive x-axis. The ball leaves your hand with a speed of 65.0 m/s. The ball reaches a maximum height in its trajectory and then is caught by someone at the same height at which i ...
... At t = 0 , you stand at the origin and throw a ball at an angle of 30.0 degrees (Counter-Clockwise) with respect to the positive x-axis. The ball leaves your hand with a speed of 65.0 m/s. The ball reaches a maximum height in its trajectory and then is caught by someone at the same height at which i ...
Circular Motion Notes
... As a satellite orbits the earth, it is pulled toward the earth with a gravitational force which is acting as a centripetal force. The inertia of the satellite causes it to tend to follow a straight-line path, but the centripetal gravitational force pulls it toward the center of the orbit. If a satel ...
... As a satellite orbits the earth, it is pulled toward the earth with a gravitational force which is acting as a centripetal force. The inertia of the satellite causes it to tend to follow a straight-line path, but the centripetal gravitational force pulls it toward the center of the orbit. If a satel ...
Dynamics Review Outline
... N and 17 N (it just depends on what angle you choose to have between them). It is therefore true that any vector between 3 N and 17 N could be added this system to produce equilibrium. ...
... N and 17 N (it just depends on what angle you choose to have between them). It is therefore true that any vector between 3 N and 17 N could be added this system to produce equilibrium. ...
8.012 Physics I: Classical Mechanics
... (a) [5 pts] How much work does the contact force apply to the system as a function of angle? (b) [5 pts] What is the angular speed of the bar as a function of angle? (c) [5 pts] What is the angular acceleration of the bar as a function of angle? (d) [10 pts] What are the vertical and horizontal forc ...
... (a) [5 pts] How much work does the contact force apply to the system as a function of angle? (b) [5 pts] What is the angular speed of the bar as a function of angle? (c) [5 pts] What is the angular acceleration of the bar as a function of angle? (d) [10 pts] What are the vertical and horizontal forc ...
Physics
... 3. mass is measured in terms of Newton's laws a. inertial mass = object's resistance to change in motion (first law) b. gravitational mass = gravity's affect on an object (second law) 4. third law forces are equal and opposite, but don't cancel each other out because they act on different objects, w ...
... 3. mass is measured in terms of Newton's laws a. inertial mass = object's resistance to change in motion (first law) b. gravitational mass = gravity's affect on an object (second law) 4. third law forces are equal and opposite, but don't cancel each other out because they act on different objects, w ...
Inverse Square Laws
... D) the food is terrible and they work all the time E) ... nonsense! The astronauts do have weight in space. TRUE or FALSE: 8. _______ The value of G (in the equation above) is an enormously large number; that explains why (at least in part) the force of gravitational attraction between the Sun and t ...
... D) the food is terrible and they work all the time E) ... nonsense! The astronauts do have weight in space. TRUE or FALSE: 8. _______ The value of G (in the equation above) is an enormously large number; that explains why (at least in part) the force of gravitational attraction between the Sun and t ...
Phys1443-003, Fall04,Term 1 Exercise Problems 1
... c. more information is needed. 24. Vector A has an x component of 3 and a y component of 4. The angle A makes with the x axis is a. 53.1ø b. 36.9ø c. 45ø d.23.1ø 25. Given two vectors of magnitudes 2 and 4 (but unspecified direction), if we add them together the maximum magnitude of the resultant ve ...
... c. more information is needed. 24. Vector A has an x component of 3 and a y component of 4. The angle A makes with the x axis is a. 53.1ø b. 36.9ø c. 45ø d.23.1ø 25. Given two vectors of magnitudes 2 and 4 (but unspecified direction), if we add them together the maximum magnitude of the resultant ve ...
Notes - Net Forces and Applications of Newton`s Laws
... kilograms, and g is the acceleration due to gravity. Advanced Look at Weight It is easy to see that the force of gravity acts on an object when it is falling. When an object is at rest on a surface, the gravitational force still continues to act. According to the second law, only a net force would c ...
... kilograms, and g is the acceleration due to gravity. Advanced Look at Weight It is easy to see that the force of gravity acts on an object when it is falling. When an object is at rest on a surface, the gravitational force still continues to act. According to the second law, only a net force would c ...
MIdterm Review # 2
... 3. A man weighing 800 Newtons is standing in an elevator. If the elevator rises with an acceleration of 9.8 meters per second2, the force exerted by the elevator on the man will be 1600 N 4. When an unbalanced force of 10. Newtons is applied to an object whose mass is 4.0 kilograms, the acceleration ...
... 3. A man weighing 800 Newtons is standing in an elevator. If the elevator rises with an acceleration of 9.8 meters per second2, the force exerted by the elevator on the man will be 1600 N 4. When an unbalanced force of 10. Newtons is applied to an object whose mass is 4.0 kilograms, the acceleration ...
Modified Newtonian dynamics
In physics, modified Newtonian dynamics (MOND) is a theory that proposes a modification of Newton's laws to account for observed properties of galaxies. Created in 1983 by Israeli physicist Mordehai Milgrom, the theory's original motivation was to explain the fact that the velocities of stars in galaxies were observed to be larger than expected based on Newtonian mechanics. Milgrom noted that this discrepancy could be resolved if the gravitational force experienced by a star in the outer regions of a galaxy was proportional to the square of its centripetal acceleration (as opposed to the centripetal acceleration itself, as in Newton's Second Law), or alternatively if gravitational force came to vary inversely with radius (as opposed to the inverse square of the radius, as in Newton's Law of Gravity). In MOND, violation of Newton's Laws occurs at extremely small accelerations, characteristic of galaxies yet far below anything typically encountered in the Solar System or on Earth.MOND is an example of a class of theories known as modified gravity, and is an alternative to the hypothesis that the dynamics of galaxies are determined by massive, invisible dark matter halos. Since Milgrom's original proposal, MOND has successfully predicted a variety of galactic phenomena that are difficult to understand from a dark matter perspective. However, MOND and its generalisations do not adequately account for observed properties of galaxy clusters, and no satisfactory cosmological model has been constructed from the theory.